Christian bayer



C. BAYER.

D003 SPRING AND CHECK.

(No Model.)

No. 578,962. Patented Mar. 16, 1897.

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CHRISTIAN BAYER, OF NEV YORK, N. Y.

DOOR SPRING AND CHECK.

SPECIFICATION forming part of Letters Patent No. 578,962, dated March16, 1897.

Application filed January 5, 1897. Serial No. 618,065. (No model.)

To LIZ whom t may concern,.-

Beit known that I, CHRISTIAN BAYER, of New York city, in the county andState of New York, have invented a new and Improved Door Spring andCheck, of which the following is a full, clear, and exact description.

This invention relates to springs for closing doors and checks toprevent slamming of the doors; and the object is to provide a simpledevice for this purpose in which there are but few parts and in whichthe use of air or liquid as in ordinary door-springs is avoided.

I will describe a door spring and check embodying my invention and thenpoint out the novel features in the appended claims.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar characters of reference indicatecorresponding` parts in all the views.

Figure l is a top plan view of a door spring and check embodying myinvention. Fig. 2 is a side elevation thereof, and Fig. 3 is a frontelevation.

The device comprises a swinging arm 1, having a pivotal connection 2with a bracket 3, secured to the door-casing above the door. The freeend of the arm l is provided with a tubular barrel 4, within which ismounted to rotate a block 5. Extended throughatransverse hole in theblock 5 is a door-operating rod 6, connected at one end to a verticalshaft 7, having bearings in lugs 8, extended from a plate 9, secured tothe door. The lower end of the shaft 7 is turned outward and thenupward, forming an arm 10, designed to be engaged by the ends of springs11 and 12, which I term the check-springs. These checksprings are coiledin opposite directions and are respectively mounted on rods attached tolugs extended from the plate 9. Of course one end of each spring 11 and12 will be attached to the plate 9.

To the upper end of the shaft 7 is secured one end of the maindoor-spring 13. The other end of said spring 13 is attached to a chain14E, which extends around the barrel 4 and engages with a dog l5, adjustably mount ed on the arm 1. As here shown, the arm I is provided witha longitudinal slot through which the dog 15 projects, and the upper endof the dog has laterally-extended pins to engage upon the upper surfaceof the arm. The

lower side of the arm at each side of the slot is provided withrack-teeth 16, with which projections on the dog 15 will engage.

In operation as the door is swung to an open position the arm 1 willturn on its pivot and the rod 6 will be carried around with itspivotblock 5. This movement will coil the chain 14 around the barrel 4C,expanding the spring 13. Upon releasing the door the spring 13 willcontract and draw the door closed. Of course during the movement of thedoor the shaft '7 will be rotated, and when the door is nearly closedthe springs 1l and 12 will act as a check by bearing uponthe arm 10 ofthe shaft and prevent slamming. These springs 11 and 12 will aid themain closing-spring13 somewhat in drawing the door closed. The tensionof the spring 13 may be adjusted by moving the dog l5 along the arm l.

It will be noted that this device may be arranged on either a right-handor left-hand door, and, further, that there is no danger of itsdestruction by water or frost, as often happens with other door-springs.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. A door spring and check, comprising a swinging armadapted to be mounted on a door-casing, a barrel on the free end of saidarm, a block mounted to rotate in said barrel, a rod extended throughsaid block, a shaft designed to rotate on a door and with which said rodis connected, a spring connected at one end to said shaft, a chainextended from the other end of said spring around the barrel on the arm,and means for connecting the end of the chain to the arm, substantiallyas specified.

2. A door spring and check, comprising a swinging arm designed to besupported on the door-casing, a tubular barrel on the free end of saidarm, a block mounted to rotate in said barrel, a rod having connectionwith said block at one end, a vertical shaft to which the other end ofsaid rod is attached, a plate on which said shaft is mounted to rotate,oppositely-coiled springs on said plate and having their ends connectedwith an upwardlyturned portion of the shaft, amainspring attached at oneend to the shaft, a chain extended from the other end of said spring IOOspring attached at one end to the shaft, a chain extended from theopposite end of said mainspring around the barrel, and a dog to Whichthe end of said chain is attached, the said dog being movable in a slotformed in the arm and having projections to engage the rack-teeth on thearm, substantially as speci- 2o fied.

CHRISTIAN BAYER.

Witnesses:

JNO. M. RITTER, C. R. FERGUSON.

